Microchip Technology PRO MATE II, Руководство пользователя

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1999 Microchip Technology Inc. DS30243H-page 31
Chapter 3. Programming K
EE
L
OQ
®
Devices
Auto Shutoff Timer If this bit is enabled, the encoder will automatically
shutoff after a time (dependent on the transmission
speed) preventing the battery of a transmitter going flat
if the transmitter is accidentally pressed in a pocket or
handbag.
Counter Overflow If this is enabled, the overflow bit will be set.
Table 3.11: Transmission Format
Option
Modulation Format
PWM VPWM
1/3 – 2/3 or
Tx Wakeup
Disabled
A to PWM duty cycle
is used.
No wakeup pulse train
transmitted on first
transmission.
1/6 – 2/6 or Tx
Wakeup Enabled
A to PWM duty cycle
is used.
A wakeup pulse train is
transmitted before the first
code word.
Table 3.12: Options Automatically Set – HCS361
Option Set To
SYNC_A Counter set to 0
SEED_0,
SEED_1, SEED2 The 48 bit SEED is a randomly generated number.
SPM The SPM bit in the configuration word is always set to 1.
SEED The SEED bit in the configuration word is set if a
decoder that uses secure learn is selected.
IND The IND bit in the configuration word always cleared
disabling independent mode.
USRA0, USRA1 The USRA bits in the configuration words are set equal
to the serial number bits 9 and 10 extending the
discriminator to 10 bits.
USRB0, USRB1 The USRB bits in the configuration word are set to 00.
XSER The XSER bit in the configuration word is always set to
00.
TMPSD The TMPSD bit in the configuration word is always set
to 0.
Table 3.10: Selectable Options – HCS361 (Continued)
Option Description
1
3
---
2
3
---
1
6
---
2
6
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